How do you turn on the high idle on a Duramax?
How do you turn on the high idle on a Duramax?
High Idle Speed Enable and Disable
- Turn the ignition ON with the engine OFF.
- Depress the accelerator pedal to the floor and hold down.
- While the accelerator pedal is depressed, depress the brake pedal 3 times in less than 8 seconds.
- Release the accelerator pedal.
- Start the engine.
Where is the fast idle switch on a Duramax?
The manual fast idle switch is operated using the cruise control buttons on the left side of the steering wheel. . The parking brake is set. . The brake pedal is not pressed.
Where is the ignition switch on a Duramax?
Turning the ignition switch to the LOCK/OFF position. It operates using the cruise control switches, so it should be just a programming change. (like setting an enable ‘bit’?) (the ‘elevated idle’, used to warm the engine and trans, is standard on all 6.6L Dmaxes.) If equipped, this feature is available only with cruise control.
Are there any problems with the LLY Duramax?
In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.
Why is my Duramax diesel engine not working?
The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.
How does high idle work on a Duramax truck?
The first feature of the High Idle is designed to increase the RPM of the Duramax Truck. While the engine is running, and in park, the cruise control device can be switched on and the engine will begin to increase the RPM to 1,200. The High Idle can also raise the RPM to 1,800 by pushing on the acceleration switch for the cruise control.
What kind of wire is needed for a Duramax idle switch?
PARTS NEEDED: 1) Terminal GM part #12084913 (5 per package) or GM part #12084912 (10 per package) to add to the ECM at terminal position C1-71. 2) Fifteen feet of 18 or 20-gauge wire. The length of wire needed will be dependent on the location of the high idle switch.
How does the high idle / valet switch work?
Product Description: This new product is called the High Idle/Valet Switch and has two great features. The first feature of the High Idle is designed to increase the RPM of the Duramax Truck. While the engine is running, and in park, the cruise control device can be switched on and the engine will begin to increase the RPM to 1,200.
What is the high idle switch on a Silverado?
The High Idle Switch, also known as the “Fast Idle System With Switch” in the manual, is described on page 2-25 of my 2008 Silverado manual. What manual do you have? The quote above is a direct copy of that information. I will be interested to learn how yours works. My truck came without the HIS even though I ordered it.
